1 //===- llvm/unittest/IR/IRBuilderTest.cpp - IRBuilder tests ---------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/IR/IRBuilder.h" 11 #include "llvm/ADT/OwningPtr.h" 12 #include "llvm/IR/BasicBlock.h" 13 #include "llvm/IR/DataLayout.h" 14 #include "llvm/IR/Function.h" 15 #include "llvm/IR/IntrinsicInst.h" 16 #include "llvm/IR/LLVMContext.h" 17 #include "llvm/IR/MDBuilder.h" 18 #include "llvm/IR/Module.h" 19 #include "llvm/Support/NoFolder.h" 20 #include "gtest/gtest.h" 21 22 using namespace llvm; 23 24 namespace { 25 26 class IRBuilderTest : public testing::Test { 27 protected: 28 virtual void SetUp() { 29 M.reset(new Module("MyModule", Ctx)); 30 FunctionType *FTy = FunctionType::get(Type::getVoidTy(Ctx), 31 /*isVarArg=*/false); 32 F = Function::Create(FTy, Function::ExternalLinkage, "", M.get()); 33 BB = BasicBlock::Create(Ctx, "", F); 34 GV = new GlobalVariable(*M, Type::getFloatTy(Ctx), true, 35 GlobalValue::ExternalLinkage, 0); 36 } 37 38 virtual void TearDown() { 39 BB = 0; 40 M.reset(); 41 } 42 43 LLVMContext Ctx; 44 OwningPtr<Module> M; 45 Function *F; 46 BasicBlock *BB; 47 GlobalVariable *GV; 48 }; 49 50 TEST_F(IRBuilderTest, Lifetime) { 51 IRBuilder<> Builder(BB); 52 AllocaInst *Var1 = Builder.CreateAlloca(Builder.getInt8Ty()); 53 AllocaInst *Var2 = Builder.CreateAlloca(Builder.getInt32Ty()); 54 AllocaInst *Var3 = Builder.CreateAlloca(Builder.getInt8Ty(), 55 Builder.getInt32(123)); 56 57 CallInst *Start1 = Builder.CreateLifetimeStart(Var1); 58 CallInst *Start2 = Builder.CreateLifetimeStart(Var2); 59 CallInst *Start3 = Builder.CreateLifetimeStart(Var3, Builder.getInt64(100)); 60 61 EXPECT_EQ(Start1->getArgOperand(0), Builder.getInt64(-1)); 62 EXPECT_EQ(Start2->getArgOperand(0), Builder.getInt64(-1)); 63 EXPECT_EQ(Start3->getArgOperand(0), Builder.getInt64(100)); 64 65 EXPECT_EQ(Start1->getArgOperand(1), Var1); 66 EXPECT_NE(Start2->getArgOperand(1), Var2); 67 EXPECT_EQ(Start3->getArgOperand(1), Var3); 68 69 Value *End1 = Builder.CreateLifetimeEnd(Var1); 70 Builder.CreateLifetimeEnd(Var2); 71 Builder.CreateLifetimeEnd(Var3); 72 73 IntrinsicInst *II_Start1 = dyn_cast<IntrinsicInst>(Start1); 74 IntrinsicInst *II_End1 = dyn_cast<IntrinsicInst>(End1); 75 ASSERT_TRUE(II_Start1 != NULL); 76 EXPECT_EQ(II_Start1->getIntrinsicID(), Intrinsic::lifetime_start); 77 ASSERT_TRUE(II_End1 != NULL); 78 EXPECT_EQ(II_End1->getIntrinsicID(), Intrinsic::lifetime_end); 79 } 80 81 TEST_F(IRBuilderTest, CreateCondBr) { 82 IRBuilder<> Builder(BB); 83 BasicBlock *TBB = BasicBlock::Create(Ctx, "", F); 84 BasicBlock *FBB = BasicBlock::Create(Ctx, "", F); 85 86 BranchInst *BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB); 87 TerminatorInst *TI = BB->getTerminator(); 88 EXPECT_EQ(BI, TI); 89 EXPECT_EQ(2u, TI->getNumSuccessors()); 90 EXPECT_EQ(TBB, TI->getSuccessor(0)); 91 EXPECT_EQ(FBB, TI->getSuccessor(1)); 92 93 BI->eraseFromParent(); 94 MDNode *Weights = MDBuilder(Ctx).createBranchWeights(42, 13); 95 BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB, Weights); 96 TI = BB->getTerminator(); 97 EXPECT_EQ(BI, TI); 98 EXPECT_EQ(2u, TI->getNumSuccessors()); 99 EXPECT_EQ(TBB, TI->getSuccessor(0)); 100 EXPECT_EQ(FBB, TI->getSuccessor(1)); 101 EXPECT_EQ(Weights, TI->getMetadata(LLVMContext::MD_prof)); 102 } 103 104 TEST_F(IRBuilderTest, LandingPadName) { 105 IRBuilder<> Builder(BB); 106 LandingPadInst *LP = Builder.CreateLandingPad(Builder.getInt32Ty(), 107 Builder.getInt32(0), 0, "LP"); 108 EXPECT_EQ(LP->getName(), "LP"); 109 } 110 111 TEST_F(IRBuilderTest, GetIntTy) { 112 IRBuilder<> Builder(BB); 113 IntegerType *Ty1 = Builder.getInt1Ty(); 114 EXPECT_EQ(Ty1, IntegerType::get(Ctx, 1)); 115 116 DataLayout* DL = new DataLayout(M.get()); 117 IntegerType *IntPtrTy = Builder.getIntPtrTy(DL); 118 unsigned IntPtrBitSize = DL->getPointerSizeInBits(0); 119 EXPECT_EQ(IntPtrTy, IntegerType::get(Ctx, IntPtrBitSize)); 120 delete DL; 121 } 122 123 TEST_F(IRBuilderTest, FastMathFlags) { 124 IRBuilder<> Builder(BB); 125 Value *F; 126 Instruction *FDiv, *FAdd; 127 128 F = Builder.CreateLoad(GV); 129 F = Builder.CreateFAdd(F, F); 130 131 EXPECT_FALSE(Builder.getFastMathFlags().any()); 132 ASSERT_TRUE(isa<Instruction>(F)); 133 FAdd = cast<Instruction>(F); 134 EXPECT_FALSE(FAdd->hasNoNaNs()); 135 136 FastMathFlags FMF; 137 Builder.SetFastMathFlags(FMF); 138 139 F = Builder.CreateFAdd(F, F); 140 EXPECT_FALSE(Builder.getFastMathFlags().any()); 141 142 FMF.setUnsafeAlgebra(); 143 Builder.SetFastMathFlags(FMF); 144 145 F = Builder.CreateFAdd(F, F); 146 EXPECT_TRUE(Builder.getFastMathFlags().any()); 147 ASSERT_TRUE(isa<Instruction>(F)); 148 FAdd = cast<Instruction>(F); 149 EXPECT_TRUE(FAdd->hasNoNaNs()); 150 151 // Now, try it with CreateBinOp 152 F = Builder.CreateBinOp(Instruction::FAdd, F, F); 153 EXPECT_TRUE(Builder.getFastMathFlags().any()); 154 ASSERT_TRUE(isa<Instruction>(F)); 155 FAdd = cast<Instruction>(F); 156 EXPECT_TRUE(FAdd->hasNoNaNs()); 157 158 F = Builder.CreateFDiv(F, F); 159 EXPECT_TRUE(Builder.getFastMathFlags().any()); 160 EXPECT_TRUE(Builder.getFastMathFlags().UnsafeAlgebra); 161 ASSERT_TRUE(isa<Instruction>(F)); 162 FDiv = cast<Instruction>(F); 163 EXPECT_TRUE(FDiv->hasAllowReciprocal()); 164 165 Builder.clearFastMathFlags(); 166 167 F = Builder.CreateFDiv(F, F); 168 ASSERT_TRUE(isa<Instruction>(F)); 169 FDiv = cast<Instruction>(F); 170 EXPECT_FALSE(FDiv->hasAllowReciprocal()); 171 172 FMF.clear(); 173 FMF.setAllowReciprocal(); 174 Builder.SetFastMathFlags(FMF); 175 176 F = Builder.CreateFDiv(F, F); 177 EXPECT_TRUE(Builder.getFastMathFlags().any()); 178 EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal); 179 ASSERT_TRUE(isa<Instruction>(F)); 180 FDiv = cast<Instruction>(F); 181 EXPECT_TRUE(FDiv->hasAllowReciprocal()); 182 183 Builder.clearFastMathFlags(); 184 185 F = Builder.CreateFDiv(F, F); 186 ASSERT_TRUE(isa<Instruction>(F)); 187 FDiv = cast<Instruction>(F); 188 EXPECT_FALSE(FDiv->getFastMathFlags().any()); 189 FDiv->copyFastMathFlags(FAdd); 190 EXPECT_TRUE(FDiv->hasNoNaNs()); 191 192 } 193 194 TEST_F(IRBuilderTest, WrapFlags) { 195 IRBuilder<true, NoFolder> Builder(BB); 196 197 // Test instructions. 198 GlobalVariable *G = new GlobalVariable(*M, Builder.getInt32Ty(), true, 199 GlobalValue::ExternalLinkage, 0); 200 Value *V = Builder.CreateLoad(G); 201 EXPECT_TRUE( 202 cast<BinaryOperator>(Builder.CreateNSWAdd(V, V))->hasNoSignedWrap()); 203 EXPECT_TRUE( 204 cast<BinaryOperator>(Builder.CreateNSWMul(V, V))->hasNoSignedWrap()); 205 EXPECT_TRUE( 206 cast<BinaryOperator>(Builder.CreateNSWSub(V, V))->hasNoSignedWrap()); 207 EXPECT_TRUE(cast<BinaryOperator>( 208 Builder.CreateShl(V, V, "", /* NUW */ false, /* NSW */ true)) 209 ->hasNoSignedWrap()); 210 211 EXPECT_TRUE( 212 cast<BinaryOperator>(Builder.CreateNUWAdd(V, V))->hasNoUnsignedWrap()); 213 EXPECT_TRUE( 214 cast<BinaryOperator>(Builder.CreateNUWMul(V, V))->hasNoUnsignedWrap()); 215 EXPECT_TRUE( 216 cast<BinaryOperator>(Builder.CreateNUWSub(V, V))->hasNoUnsignedWrap()); 217 EXPECT_TRUE(cast<BinaryOperator>( 218 Builder.CreateShl(V, V, "", /* NUW */ true, /* NSW */ false)) 219 ->hasNoUnsignedWrap()); 220 221 // Test operators created with constants. 222 Constant *C = Builder.getInt32(42); 223 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWAdd(C, C)) 224 ->hasNoSignedWrap()); 225 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWSub(C, C)) 226 ->hasNoSignedWrap()); 227 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWMul(C, C)) 228 ->hasNoSignedWrap()); 229 EXPECT_TRUE(cast<OverflowingBinaryOperator>( 230 Builder.CreateShl(C, C, "", /* NUW */ false, /* NSW */ true)) 231 ->hasNoSignedWrap()); 232 233 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWAdd(C, C)) 234 ->hasNoUnsignedWrap()); 235 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWSub(C, C)) 236 ->hasNoUnsignedWrap()); 237 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWMul(C, C)) 238 ->hasNoUnsignedWrap()); 239 EXPECT_TRUE(cast<OverflowingBinaryOperator>( 240 Builder.CreateShl(C, C, "", /* NUW */ true, /* NSW */ false)) 241 ->hasNoUnsignedWrap()); 242 } 243 244 TEST_F(IRBuilderTest, RAIIHelpersTest) { 245 IRBuilder<> Builder(BB); 246 EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal()); 247 MDBuilder MDB(M->getContext()); 248 249 MDNode *FPMathA = MDB.createFPMath(0.01f); 250 MDNode *FPMathB = MDB.createFPMath(0.1f); 251 252 Builder.SetDefaultFPMathTag(FPMathA); 253 254 { 255 IRBuilder<>::FastMathFlagGuard Guard(Builder); 256 FastMathFlags FMF; 257 FMF.setAllowReciprocal(); 258 Builder.SetFastMathFlags(FMF); 259 Builder.SetDefaultFPMathTag(FPMathB); 260 EXPECT_TRUE(Builder.getFastMathFlags().allowReciprocal()); 261 EXPECT_EQ(FPMathB, Builder.getDefaultFPMathTag()); 262 } 263 264 EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal()); 265 EXPECT_EQ(FPMathA, Builder.getDefaultFPMathTag()); 266 267 Value *F = Builder.CreateLoad(GV); 268 269 { 270 IRBuilder<>::InsertPointGuard Guard(Builder); 271 Builder.SetInsertPoint(cast<Instruction>(F)); 272 EXPECT_EQ(F, Builder.GetInsertPoint()); 273 } 274 275 EXPECT_EQ(BB->end(), Builder.GetInsertPoint()); 276 EXPECT_EQ(BB, Builder.GetInsertBlock()); 277 } 278 279 280 } 281